Thermoelectric properties of the stripe-charge ordering phases in IrTe2

We investigate the effects of stripe-charge ordering on the thermoelectric power of IrTe2, together with other transport properties, including the resistivity, thermal conductivity, and Hall effect. At the stripe-charge ordering transitions, clear transport anomalies such as abrupt changes in the thermoelectric power and Hall effect are observed and attributed to multiband conduction due to stripe-order-driven Fermi surface (FS) reconstruction. This FS reconstruction depends sensitively on intralayer charge modulations and interlayer staircaselike arrangements, leading to complex sign changes in the thermoelectric power. These results are in good agreement with the Boltzmann transport calculations based on the reconstructed FS and confirm the strong impact of the stripe charge order on the intrinsic charge conduction in IrTe2.